 Python Page 4 - Checkboxes and Radio Buttons in wxPython |
wxRadioBox - PythonIn this article, we will focus on two basic controls and a few relatives: checkboxes and radio buttons. Both controls give the user a variety of options and yet him or her choose anywhere from one to all of them.
print this article SEARCH DEV SHED |
By using wxRadioBox, it is possible to create a boxed group of radio buttons. The result looks like a group of radio buttons surrounded by a wxStaticBox and is visually appealing.The creation of a wxRadioBox is incredibly simple because the labels of each radio box are passed in the form of a list. The rows and columns of the wxRadioBox are then determined by the majorDimension variable and either the wxRA_SPECIFY_ROWS or the wxRA_SPECIFY_COLS style. If wxRA_SPECIFY_ROWS is passed, the value in majorDimension will be the number of rows. The same thing works for wxRA_SPECIFY_COLS and columns. Let's take a closer look at how it all works: from wxPython.wx import * class Window ( wxFrame ): def __init__ ( self ): wxFrame.__init__ ( self, None, -1, 'wxRadioBox', size = ( 300, 300 ) ) # Create a status bar self.CreateStatusBar() # Create a panel self.panel = wxPanel ( self, -1 ) # Create a list of radio buttons self.radioList = [ 'This', 'Is', 'A', 'Box', 'Full', 'Of', 'Radio', 'Buttons' ] # Create a wxRadioBox with two rows self.radioBox1 = wxRadioBox ( self.panel, 1, 'Radio Box 1', choices = self.radioList, majorDimension = 2, style = wxRA_SPECIFY_ROWS ) # Create a wxRadoiBox with two columns self.radioBox2 = wxRadioBox ( self.panel, 1, 'Radio Box 2', choices = self.radioList, majorDimension = 2, style = wxRA_SPECIFY_COLS ) # Tie in methods to handle a click EVT_RADIOBOX ( self.panel, 1, self.radioClick ) # Center everything self.vertical = wxBoxSizer ( wxVERTICAL ) self.vertical.Add ( ( 0, 0 ), 1 ) self.vertical.Add ( self.radioBox1, 0, wxALIGN_CENTER ) self.vertical.Add ( ( 5, 5 ), 0 ) self.vertical.Add ( self.radioBox2, 0, wxALIGN_CENTER ) self.vertical.Add ( ( 0, 0 ), 1 ) self.horizontal = wxBoxSizer ( wxHORIZONTAL ) self.horizontal.Add ( ( 0, 0 ), 1 ) self.horizontal.Add ( self.vertical, 0, wxALIGN_CENTER ) self.horizontal.Add ( ( 0, 0 ), 1 ) # Attach the sizer self.panel.SetSizerAndFit ( self.horizontal ) self.Show ( True ) def radioClick ( self, event ): # Get the wxRadioBox radioBox = event.GetEventObject() # Get the index of the selected button radioIndex = radioBox.GetSelection() # Get the string of the selected button radioString = radioBox.GetStringSelection() # Update the status bar self.SetStatusText ( str ( radioIndex ) + ': ' + radioString ) application = wxPySimpleApp() Window() application.MainLoop() There are other things you can do with a wxRadioBox, too. You can disable a wxRadioBox, find the location of a label, count the buttons, get the label of a button, set the label of a button and set the current selection. Let's take a look at these features: from wxPython.wx import * class Window ( wxFrame ): def __init__ ( self ): wxFrame.__init__ ( self, None, -1, 'wxRadioBox Features', size = ( 300, 300 ) ) # Create a panel self.panel = wxPanel ( self, -1 ) # Create a wxRadioBox to experiment on self.box = wxRadioBox ( self.panel, 100, 'A Radio Box', choices = [ 'A', 'B', 'C', 'D' ], majorDimension = 2, style = wxRA_SPECIFY_COLS ) # Handle a click with a method EVT_RADIOBOX ( self.panel, 100, self.radioClick ) # Create a label to count the items in our wxRadioBox self.count = wxStaticText ( self.panel, -1, 'Count: ' + str ( self.box.GetCount() ) ) # Create a label to display the label of the currently selected button self.label = wxStaticText ( self.panel, -1, 'Label: ' + str ( self.box.GetItemLabel ( self.box.GetSelection() ) ) ) # Create a label to display the position of the radio button whose label is "A": self.find = wxStaticText ( self.panel, -1, '"A": ' + str ( self.box.FindString ( 'A' ) ) ) # Create a button that disables the entire wxRadioBox and attach a handler self.disableBoxButton = wxButton ( self.panel, 200, 'Disable Box' ) EVT_BUTTON ( self.panel, 200, self.disableBox ) # Create a button that disables the currently selected item and attach a handler self.disableItemButton = wxButton ( self.panel, 300, 'Disable Item' ) EVT_BUTTON ( self.panel, 300, self.disableItem ) # Create a button that changes the label of the currently selected item and attach a handler self.changeLabelButton = wxButton ( self.panel, 400, 'Change Label' ) EVT_BUTTON ( self.panel, 400, self.changeLabel ) # Center things in two sizers self.vertical = wxBoxSizer ( wxVERTICAL ) self.vertical.Add ( ( 0, 0 ), 1 ) self.vertical.Add ( self.box, 0, wxALIGN_CENTER ) self.vertical.Add ( ( 5, 5 ), 0 ) self.vertical.Add ( self.count, 0, wxALIGN_CENTER ) self.vertical.Add ( ( 5, 5 ), 0 ) self.vertical.Add ( self.label, 0, wxALIGN_CENTER ) self.vertical.Add ( ( 5, 5 ), 0 ) self.vertical.Add ( self.find, 0, wxALIGN_CENTER ) self.vertical.Add ( ( 5, 5 ), 0 ) self.vertical.Add ( self.disableBoxButton, 0, wxALIGN_CENTER ) self.vertical.Add ( ( 5, 5 ), 0 ) self.vertical.Add ( self.disableItemButton, 0, wxALIGN_CENTER ) self.vertical.Add ( ( 5, 5 ), 0 ) self.vertical.Add ( self.changeLabelButton, 0, wxALIGN_CENTER ) self.vertical.Add ( ( 0, 0 ), 1 ) self.horizontal = wxBoxSizer ( wxHORIZONTAL ) self.horizontal.Add ( ( 0, 0 ), 1 ) self.horizontal.Add ( self.vertical, 0, wxALIGN_CENTER ) self.horizontal.Add ( ( 0, 0 ), 1 ) # Attach our horizontal sizer self.panel.SetSizerAndFit ( self.horizontal ) self.Show ( True ) # This method is called when a radio button is clicked def radioClick ( self, event ): # Update the label label self.label.SetLabel ( 'Label: ' + str ( self.box.GetItemLabel ( self.box.GetSelection() ) ) ) # This method is called when the "Disable Box" button is clicked def disableBox ( self, event ): # Disable the wxRadioBox self.box.Enable ( False ) # This method is called when the "Disable Item" button is clicked def disableItem ( self, event ): # Disable the currently selected item self.box.EnableItem ( self.box.GetSelection(), False ) # This method is called when the "Set Label" button is clicked def changeLabel ( self, event ): # Set the label of the currently selected button to "Q" self.box.SetItemLabel ( self.box.GetSelection(), 'Q' ) # Update the find label self.find.SetLabel ( '"A": ' + str ( self.box.FindString ( 'A' ) ) ) application = wxPySimpleApp() Window() application.MainLoop() Conclusion Several “box” controls are offered in wxPython, and they can serve multiple purposes as I mentioned earlier. It's all up to your creativity. These controls are very simple to use, featuring only a few methods and styles, yet they offer you a large amount of flexibility. These controls can improve your applications when necessary, pleasing their users – the goal of your graphical user interfaces.
blog comments powered by Disqus |
|
|
|
|
|
|
|
